Continuous variable transmissin device with low shift transmission pulley train

ABSTRACT

The invented continuous variable transmission device with low shift transmission pulley train is innovatingly disclosed by that a low shift transmission pulley train and attached unidirectional transmission device in the same rotating direction are installed between the input shaft and output shaft of a continuous variable transmission device, wherein during high load operation, when rotating speed of the driving pulley of low shift transmission pulley train is lower than that of the input shaft in the same revolving direction, the revolving kinetic energy of the input shaft is transmitted through the unidirectional transmission device and the low shift transmission pulley train to drive the output shaft and further to drive the load.

BACKGROUND OF THE INVENTION

(a) Field of the Invention

The operation schemes of continuous transmission for various knowncontinuous variable transmission devices of different shafts typeinclude:

The spacing between the variable spacing transmission V-belt grooves ofdriving and driven pulleys is modulated, whereby the operative belttransmission radial distance of driving pulley or driven pulley ischanged to further change the transmission speed ratio between thedriving pulley and the driven pulley;

The above said spacing modulation for variable spacing transmissionV-belt grooves of driving or driven pulleys of the continuous variabletransmission device is required to be driven by one or more than onekinds of axial driving forces including:

1. Through a variable centrifugal force generation mechanism by changesof the rotational speed of the input shaft to generate a variable axialdriving force whereby to change the spacing of the transmission V-beltgrooves of the driving pulley;

2. Through a variable centrifugal force generating mechanism by changesof the rotational speed of the output shaft to generate a variable axialdriving force whereby to change the spacing of the transmission V-beltgrooves of the driven pulley;

3. Through a variable axial driving force generating mechanism bychanges of the output shaft torque to generate a variable axial drivingforce whereby to change the spacing of the transmission V-belt groovesof the driving pulley;

4. Through a variable axial driving force generating mechanism bychanges of the output shaft torque to generate a variable axial drivingforce whereby to change the spacing of the transmission V-belt groovesof the driven pulley;

5. The driving or driven pulley is provided an axial pre-pressed spring,whereby the driving or driven pulley is pulled by the belt typetransmission component to generate an axial driving force, whereby tochange the variable spacing of the transmission V-belt grooves of bothor either of the driving or driving pulley;

The above said 1˜5 methods are passive operations of continuous variabletransmission function.

6. A linear driving force actively generated manually, or by mechanicalpower, electromagnetic effect, hydraulically or pneumatically drivenlinear driving device; or a revolving kinetic energy generated bydriving the electric motor, hydraulic motor or pneumatic motor isconverted through a mechanical transmission device to an axial lineartype driving force whereby to further change the spacing of variablespacing transmission V-belt grooves of both or either of the drivingpulley or driven pulley. Said method is the active operation ofcontinuous variable transmission.

(b) Description of the Prior Art

Types of conventional continuous variable transmission devices ofdifferent input and output shafts structures are numerous including:rubber belt type, metal belt type, chain type, or electronic (ECVT)type, friction disk type or known continuous variable transmissiondevice of different shafts type, etc.

SUMMARY OF THE INVENTION

The continuous variable transmission device with low shift transmissionpulley train is passively operated by an axial driving force generatedby operating torque or its rotational speed is controlled manually or byaxially pre-pressed springs on the driving and driven pulleys, oractively operated by manual, electric, mechanical, hydraulic orpneumatic powers and further referring to input preset operating modes,detected speeds and torques, etc. thereby to modulate and operate thespeed ratio of the continuous variable transmission thereof.

Although the continuous variable transmission devices of differentshafts type is advantageous in convenient operation for its automaticspeed ratio adjustment function according to the rotational speed changeof the driving pulley input shaft and the size of loading torque atloading side, said continuous variable transmission device of differentshafts type has the imperfections:

1. Due to low transmittable power, it is only suitable for middle tosmall power applications;

2. Transmission efficiency of the continuous variable transmissiondevice of different shafts type is too low;

3. Durability enhancement is required.

The invented continuous variable transmission device with low shifttransmission pulley train is innovatingly disclosed by that a low shifttransmission pulley train with fixed speed ratio in the same revolvingdirection and an attached unidirectional transmission device areinstalled between the input shaft and output shaft of a continuousvariable transmission device, wherein if a decelerating type continuousvariable transmission device is used to operated at maximum deceleratingspeed ratio or near maximum decelerating speed ratio status, or anaccelerating type continuous variable transmission device is used tooperate at minimum accelerating speed ratio or near minimum acceleratingspeed ratio status, then during high load operation, when the rotationalspeed of the driving pulley of the low shift transmission pulley trainis lower than that of the input shaft in the same revolving direction,the revolving kinetic energy of the input shaft is transmitted throughthe unidirectional transmission device and the low shift transmissionpulley train to drive the output shaft and further to drive the load. Atsaid status, the power originally transmitted through the continuousvariable transmission device of different shafts type is changed to betransmitted through the low shift transmission pulley train.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic view showing that the invention isinstalled with a radial direction type unidirectional transmissiondevice.

FIG. 2 is a structural schematic view showing that the invention isinstalled with an axial direction type unidirectional transmissiondevice.

FIG. 3 is a structural schematic view of the invention showing that anunidirectional transmission device is installed between the drivenpulley of the low shift transmission pulley train and the output shaft.

FIG. 4 is a structural schematic view showing that the low shifttransmission pulley train of the invention is constituted by a drivingchain pulley, a driven chain pulley and a transmission chain.

FIG. 5 is a structural schematic view showing that the low shifttransmission pulley train is constituted by a driving pulley, a middledriven pulley and a driven pulley.

FIG. 6 is a structural schematic view showing that the low shifttransmission pulley train is constituted by a smaller outer diametertransmission pulley and a larger outer diameter inner transmissionpulley.

FIG. 7 is a structural schematic view showing that the low shifttransmission pulley train is constituted by a driving belt pulley, adriven belt pulley and a transmission belt.

FIG. 8 is a structural schematic view of the invention showing that aspeed change pulley train is installed between the input shaft and thedriving pulley of the continuous variable transmission device ofdifferent shafts type.

FIG. 9 is a structural schematic view of the invention showing that aspeed change pulley train is installed between the output shaft and thedriven pulley of the continuous variable transmission device ofdifferent shafts type.

FIG. 10 is a structural schematic view of the invention showing thatspeed change pulley trains are installed between the input shaft and thedriving pulley of the continuous variable transmission device ofdifferent shafts type and between the output shaft and the driven pulleyof the continuous variable transmission device of different shafts type.

DESCRIPTION OF MAIN COMPONENT SYMBOLS

-   100: Continuous variable transmission device of different shafts    type-   101: Input shaft-   102: Low shift transmission pulley train-   103: Output Shaft-   111: Unidirectional transmission device-   302, 402: Speed change pulley train-   800: Driving control device

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The continuous variable transmission device with low shift transmissionpulley train is either passively operated by an axial driving forcegenerated by operating torque or its rotational speed to execute axialdrive to the driving or driven pulley and further cooperated with manualmanipulation or provided with axially pre-pressed springs to constitutethe continuous variable transmission function, or actively operated bymanual, electric, mechanical, hydraulic or pneumatic powers toconstitute the continuous variable transmission function; and furtherreferring to input preset operating modes, detected speeds and torques,etc. thereby to modulate and operate the speed ratio of the continuousvariable transmission thereof.

Although the continuous variable transmission device of different shaftstype is advantageous in convenient operation for its automatic speedratio adjustment function according to the rotational speed change ofthe driving pulley input shaft and the size of the loading torque atloading side, said continuous variable transmission device of differentshafts type has the imperfections:

1. Due to low transmittable power, it is only suitable for middle tosmall power applications;

2. Transmission efficiency of the continuous variable transmissiondevice of different shafts type is too low;

3. Durability enhancement is required.

The invented continuous variable transmission device with low shifttransmission pulley train is innovatingly disclosed by that a low shifttransmission pulley train with fixed speed ratio and attachedunidirectional transmission device in the same revolving direction areinstalled between the input shaft and output shaft of a continuousvariable transmission device, wherein if a decelerating type continuousvariable transmission device is used to operated at maximum deceleratingspeed ratio or near maximum decelerating speed ratio status, or anaccelerating type continuous variable transmission device is used tooperate at minimum accelerating speed ratio or near minimum acceleratingspeed ratio status, then during high load operation, when the drivingpulley rotational speed of low shift transmission pulley train is lowerthan that of the input shaft in the same revolving direction, therevolving kinetic energy of the input shaft is transmitted through theunidirectional transmission device and the low shift transmission pulleytrain to drive the output shaft and further to drive the load. At saidstatus, the power originally transmitted through the continuous variabletransmission device of different shafts type is changed to betransmitted through the low shift transmission pulley train.

The continuous variable transmission device with low shift transmissionpulley train is constituted by the following:

As shown in FIG. 1, besides the relevant mechanisms in the conventionalcontinuous variable transmission devices, the continuous variabletransmission device with low shift transmission pulley train is furthermainly constituted by:

A continuous variable transmission device of different shafts type 100:It is a continuous variable transmission device of different input andoutput shafts structure comprises at least one kind of rubber belt type,metal belt type, chain type, or electronic (ECVT) type, friction disktype continuous variable transmission devices, wherein transmissionspeed ratio thereof can be either passively automatically modulated byfollowing torque or following rotational speed; or actively modulated byapplying a linear driving force either generated by an externallypowered linear driving device or by a revolving driving device viamechanical transmission for conversion to change spacing between thetransmission V-belt grooves of both or either of driving and drivenpulleys.

An input shaft 101: It is the rotating shaft to receive a revolvingkinetic energy input, whereby said revolving kinetic energy istransmitted to the driving pulley of the continuous variabletransmission device of different shafts type 100 and to the input end ofthe unidirectional transmission device 111;

An output shaft 103: it is a rotating shaft to provide revolving kineticenergy output for driving the load, whereby the revolving kinetic energyfrom driven pulley of the continuous variable transmission device ofdifferent shafts type 100 or from the driven pulley of low shifttransmission pulley train 102 is transmitted by it to the load;

An unidirectional transmission device 111: It is constituted by anunidirectional transmission device in radial direction type as appliedin FIG. 1 or an unidirectional transmission device in axial directiontype as applied in FIG. 2, including the constitution by anunidirectional bearing with unidirectional transmission function, anunidirectional clutch or an unidirectional transmission mechanism ordevice, wherein said unidirectional transmission device 111 can beoptionally installed as needed between the input shaft 101 and thedriving pulley of low shift transmission pulley train 102, or installedas needed between the driven pulley of the low shift transmission pulleytrain 102 and the output shaft 103 as shown in FIG. 3;

The transmission direction of the unidirectional transmission device 111is that when rotational speed of the input shaft 101 is higher than thatof the driving pulley of the low shift transmission pulley train 102 inthe same revolving direction, the revolving kinetic energy istransmitted to the driving pulley of the low shift transmission pulleytrain 102; on the contrary, if it is not so, the revolving kineticenergy from the input shaft 101 is not transmitted to the driving pulleyof low shift transmission pulley train 102;

The low shift transmission pulley train 102: It comprises a drivingpulley which is driven by the input shaft 101 and a driven pulley fordriving the output shaft 103, wherein said driving pulley and drivenpulley are transmitted in the same revolving direction, the transmissionspeed ratio thereof appears a low shift transmission in deceleratingtransmission relative to the continuous variable transmission device ofdifferent shafts type 100, and the speed ratio relationship between thelow shift transmission pulley train 102 and the continuous variabletransmission device of different shafts type 100 is:

1. Speed ratio of the driving pulley to drive the driven pulley of lowshift transmission pulley train 102□ speed ratio of the continuousvariable transmission device of different shafts type 100 in low speedoutput;

2. Speed ratio of the continuous variable transmission device ofdifferent shafts type 100 in low speed output<Speed ratio of the drivingpulley to drive the driven pulley of low shift transmission pulley train102<speed ratio of the continuous variable transmission device ofdifferent shafts type 100 in high speed output;

The low shift transmission pulley train 102 is constituted by thefollowing:

1. It is constituted by a driving chain pulley, a driven chain pulley,and an attached transmission chain, wherein FIG. 4 is a structuralschematic view showing that the low shift transmission pulley train 102of the invention is constituted by a driving chain pulley, a drivenchain pulley and an attached transmission chain; or

2. It is constituted by a driving pulley, a middle driven pulley and adriven pulley, wherein said driving pulley, middle driven pulley anddriven pulley include constitutions by gears or friction pulleys. FIG. 5is a structural schematic view showing that the low shift transmissionpulley train 102 is constituted by a driving pulley, a middle drivenpulley and a pulley; or

3. It is constituted by an inner gear train or an inner friction pulleytrain comprising a smaller outer diameter transmission pulley and alarger outer diameter inner transmission pulley. FIG. 6 is a structuralschematic view showing that the low shift transmission pulley train 102is constituted by a smaller outer diameter transmission pulley and alarger outer diameter inner transmission pulley; or

4. It is constituted by a driving belt pulley, a driven belt pulley andan attached transmission belt such as a canvas belt, a steel belt, or achain belt. FIG. 7 is a structural schematic view showing that the lowshift transmission pulley train 102 is constituted by a driving beltpulley, a driven belt pulley and a transmission belt.

The driving control device 800: It is installed according tocharacteristics of selected continuous variable transmission device ofdifferent shafts type 100, wherein said driving control device isprovided with a driving power source which is constituted by electricpower supply unit, hydraulic oil pressure supply unit, or pneumaticpressure supply unit and relevant electric power control unit, hydraulicoil pressure control unit, or pneumatic pressure control unit toactively control the transmission speed ratio of the continuous variabletransmission device of different shafts type 100, wherein if automatictorque following speed ratio modulating mechanism, or rotational speedfollowing speed ratio modulating mechanism are selected by thecontinuous variable transmission device of different shafts type 100 tobe served as a passively operated continuous variable transmissiondevice, the driving control device 800 is not needed to be installed. Ifan actively operated continuous variable transmission device requiringan external power driving source for speed ratio modulation is selected,said driving control device 800 shall be installed to actively controlthe speed ratio of said continuous variable transmission device ofdifferent shafts type 100.

The continuous variable transmission device with low shift transmissionpulley train constituted by above said main structures includes that aninput shaft 101 of the continuous variable transmission device ofdifferent shafts type 100 is additionally installed with a drivingpulley of low shift transmission pulley train 102, and an unidirectionaltransmission device 111 is further installed between the two.Transmission direction of said unidirectional transmission device 111shall allow said continuous variable transmission device of low shifttransmission pulley train 102 to provide that: during higher loadoperation, if a decelerating type continuous variable transmissiondevice is adopted by the continuous variable transmission device ofdiffernet shafts type 100 to operate in a maximum deceleration speedratio or a near maximum deceleration speed ratio status, or if anaccelerating type continuous variable transmission device is adopted tooperate in a minimum acceleration speed ratio or a near minimumdeceleration speed ratio status, thereby to make the rotational speed ofthe driving pulley of low shift transmission pulley train 102 lower thanthat of the input shaft 101 in the same revolving direction, then therevolving kinetic energy of the input shaft 101 is transmitted throughthe unidirectional tansmission device 111 and the low shift transmissionpulley train 102 to drive the output shaft 103 and further to drive theload. At said status, the power originally transmitted directly throughsaid continuous variable transmission device of different shafts type100 is changed to be transmitted through said low shift transmissionpulley train 102 to further drive the output shaft 103. During lowerload operation, the power is directly transmitted through saidcontinuous variable transmission device of different shafts type 100 todrive the output shaft 103;

If an unidirectional transmission device 111 is selected to be installedbetween the driven pulley of low shift transmission pulley train 102 andthe output shaft 103, then during higher load operation, if adecelerating type continuous variable transmission device is adopted bythe continuous variable transmission device of differnet shafts type 100to operate in a maximum deceleration speed ratio or a near maximumdeceleration speed ratio status, or if an accelerating type continuousvariable transmission device is adopted to operate in a minimumacceleration speed ratio or a near minimum deceleration speed ratiostatus, thereby to make rotational speed of the driven pulley of lowshift transmission pulley train 102 higher than that of the output shaft103 in the same revolving direction, then the revolving kinetic energyis transmitted through the low shift transmission pulley train 102 andthe unidirectional tansmission device 111 to drive the output shaft 103and further to drive the load. At said status, the power originallytransmitted directly through said continuous variable transmissiondevice of different shafts type 100 is changed to be transmitted throughsaid low shift transmission pulley train 102 to further drive the outputshaft 103. During lower load operation, the power is directlytransmitted through said continuous variable transmission device ofdifferent shafts type 100 to drive the output shaft 103.

For sake of efficiency, when diameters of the driving pulley and thedriven pulley in the continuous variable transmission device ofdiffernet shafts type 100 of said continuous variable transmissiondevice with low shift transmission pulley train are made more similar toeach other to ensure a better efficiency, a middle transmission pulleyfor accelerating speed ratio or decelerating speed ratio can beinstalled to satisfy the needs for accelerating speed ratio ordecelerating speed ratio in order to ensure a better transmissionefficiency, wherein said middle transmission pulley includes:

1. A speed change pulley train 302 is further installed between theinput shaft 101 and the driving pulley of continuous variabletransmission device of different shafts type 100 to change the totalspeed ratio of the input shaft 101 and the output shaft 103 and ismatched to required revolving direction. FIG. 8 is a structuralschematic view of the invention showing that a speed change pulley trainis installed between the input shaft 101 and the driving pulley ofcontinuous variable transmission device of different shafts type 100; or

2. A speed change pulley train 402 is further installed between theoutput shaft 103 and the driven pulley of continuous variabletransmission device of different shafts type 100 to change the totalspeed ratio of the input shaft 101 and the output shaft 103 and ismatched to required revolving direction. FIG. 9 is a structuralschematic view of the invention showing that a speed change pulley trainis installed between the output shaft 103 and the driven pulley ofcontinuous variable transmission device of different shafts type 100; or

3. The speed change pulley trains 302, 402 are simultaneously installedbetween the input shaft 101 and the driving pulley of continuousvariable transmission device of different shafts type 100 and betweenthe output shaft 103 and the driven pulley of continuous variabletransmission device of different shafts type 100 to change the totalspeed ratio of the input shaft 101 through the continuous variabletransmission device of different shafts type 100 to the output shaft 103and are matched to required revolving direction. FIG. 10 is a structuralschematic view of the invention showing that speed change pulley trainsare installed between the input shaft 101 and the driving pulley ofcontinuous variable transmission device of different shafts type 100 andbetween the output shaft 103 and the driven pulley of continuousvariable transmission device of different shafts type 100;

The low shift transmission pulley train of said continuous variabletransmission device with low shift transmission pulley train can beselected according to application requirements to include the following:

1. To be constituted by a single stage low shift transmission pulleytrain of fixed speed ratio;

2. To be constituted by a multi-stage type low shift variabletransmission pulley train of manual shift or automatic transmission.

For said continuous variable transmission device with low shifttransmission pulley train, input methods for supplying revolving kineticenergy to the input shaft 101 can be selected based on applicationrequirements to include the following:

1. The input shaft 101 is for receiving direct revolving power sourceinput from revolving power source such as engine, motor or generator orinput from flywheel, wind power fan blades, gas or liquid turbines, ormanual power, etc.;

2. The revolving power sources as said in item 1 supplied to the inputshaft 101 for output is first controlled by a clutching device beforeproviding revolving kinetic energy output;

3. The revolving power sources as said in item 1 supplied to the inputshaft 101 for output is further through a speed change device with fixedspeed ratio, or a stepped or stepless speed change device of manualshift or automatic transmission, or a fluid transmission device, or anelectromagnetic eddy current transmission device to provide revolvingkinetic energy output;

4. The revolving power sources as said in item 1 supplied to the inputshaft 101 for output is further through a clutching device and a speedchange device with fixed speed ratio, or a stepped or stepless speedchange device of manual shift or automatic transmission, or a fluidtransmission device, or an electromagnetic eddy current transmissiondevice to provide revolving kinetic energy output.

The revolving kinetic energy output from the output shaft 103 of saidcontinuous variable transmission of low shift transmission pulley traincan be selected according to application requirements to include thefollowing:

1. The revolving kinetic energy output from the output shaft 103 isdirectly used to drive the load;

2. The revolving kinetic energy output from the output shaft 103 isthrough a clutching device to further drive the load;

3. The revolving kinetic energy from the output shaft 103 is through aspeed change device with fixed speed ratio, or a stepless or steppedspeed change device of manual shift or automatic transmission, or afluid transmission device, or electromagnetic eddy current transmissiondevice to further drive the load;

4. The revolving kinetic energy output from the output shaft 103 isthrough a clutching device and a speed change device with fixed speedratio, or a stepless or stepped speed change device of manual shift orautomatic transmission, or a fluid transmission device, or anelectromagnetic eddy current transmission device to further drive theload.

The practical applied structures of said continuous variabletransmission device of different shafts type 100 and said low shifttransmission pulley train 102 can be selectively made to independentlyseparated mechanical devices and combined afterwards for transmission ormade to an integral structure or made to a structure of a commonintegrated mechanical device and a common integrated casing.

As summarized from above descriptions, said continuous variabletransmission device with low shift transmission pulley train ischaracterized in that during high load operation, the kinetic energy istransmitted through said low shift transmission pulley train 102 todrive the output shaft 103 and to further drive the load, thereby toextend the service life of said continuous transmission device and topromote its loading efficiency.

1. A continuous variable transmission device with low shift transmissionpulley train is innovatingly disclosed by that a low shift transmissionpulley train with fixed speed ratio and attached unidirectionaltransmission device in the same revolving direction are installedbetween the input shaft and output shaft of a continuous variabletransmission device, wherein if a decelerating type continuous variabletransmission device is used to operated at maximum decelerating speedratio or near maximum decelerating speed ratio status, or anaccelerating type continuous variable transmission device is used tooperate at minimum accelerating speed ratio or near minimum acceleratingspeed ratio status, then during high load operation, when the drivingpulley rotational speed of low shift transmission pulley train is lowerthan that of the input shaft in the same revolving direction, therevolving kinetic energy of the input shaft is transmitted through theunidirectional transmission device and the low shift transmission pulleytrain to drive the output shaft and further to drive the load; at saidstatus, the power originally transmitted through the continuous variabletransmission device of different shafts type is changed to betransmitted through the low shift transmission pulley train; wherein itis mainly constituted by: A continuous variable transmission device ofdifferent shafts type (100): It is a continuous variable transmissiondevice of different input and output shafts structure comprises at leastone kind of rubber belt type, metal belt type, chain type, or electronic(ECVT) type, friction disk type continuous variable transmissiondevices, wherein transmission speed ratio thereof can be eitherpassively automatically modulated by following torque or followingrotational speed; or actively modulated by applying a linear drivingforce either generated by an externally powered linear driving device orby a revolving driving device via mechanical transmission for conversionto change spacing between the transmission V-belt grooves of both oreither of driving and driven pulleys; An input shaft (101): It is therotating shaft to receive a revolving kinetic energy input, whereby saidrevolving kinetic energy is transmitted to the driving pulley of thecontinuous variable transmission device of different shafts type (100)and to the input end of the unidirectional transmission device (111); Anoutput shaft (103): it is a rotating shaft to provide revolving kineticenergy output for driving the load, whereby the revolving kinetic energyfrom driven pulley of the continuous variable transmission device ofdifferent shafts type (100) or from the driven pulley of low shifttransmission pulley train (102) is transmitted by it to the load; Anunidirectional transmission device (111): It is constituted by anunidirectional transmission device in radial direction type or anunidirectional transmission device in axial direction type, includingthe constitution by an unidirectional bearing with unidirectionaltransmission function, an unidirectional clutch or an unidirectionaltransmission mechanism or device, wherein said unidirectionaltransmission device (111) can be optionally installed as needed betweenthe input shaft (101) and the driving pulley of low shift transmissionpulley train (102), or installed as needed between the driven pulley ofthe low shift transmission pulley train (102) and the output shaft(103); The transmission direction of the unidirectional transmissiondevice (111) is that when rotational speed of the input shaft (101) ishigher than that of the driving pulley of the low shift transmissionpulley train (102) in the same revolving direction, the revolvingkinetic energy is transmitted to the driving pulley of the low shifttransmission pulley train (102); on the contrary, if it is not so, therevolving kinetic energy from the input shaft (101) is not transmittedto the driving pulley of low shift transmission pulley train (102); Thelow shift transmission pulley train (102): It comprises a driving pulleywhich is driven by the input shaft (101) and a driven pulley for drivingthe output shaft (103), wherein said driving pulley and driven pulleyare transmitted in the same revolving direction, the transmission speedratio thereof appears a low shift transmission in deceleratingtransmission relative to the continuous variable transmission device ofdifferent shafts type (100), and the speed ratio relationship betweenthe low shift transmission pulley train (102) and the continuousvariable transmission device of different shafts type (100) is: 1) Speedratio of the driving pulley to drive the driven pulley of low shifttransmission pulley train (102)□ speed ratio of the continuous variabletransmission device of different shafts type (100) in low speed output;2) Speed ratio of the continuous variable transmission device ofdifferent shafts type (100) in low speed output<Speed ratio of thedriving pulley to drive the driven pulley of low shift transmissionpulley train (102)<speed ratio of the continuous variable transmissiondevice of different shafts type (100) in high speed output; The lowshift transmission pulley train (102) is constituted by the following:It is constituted by a driving chain pulley, a driven chain pulley, andan attached transmission chain; It is constituted by a driving pulley, amiddle driven pulley and a driven pulley, wherein said driving pulley,middle driven pulley and driven pulley include constitutions by gears orfriction pulleys; It is constituted by an inner gear train or an innerfriction pulley train comprising a smaller outer diameter transmissionpulley and a larger outer diameter inner transmission pulley; It isconstituted by a driving belt pulley, a driven belt pulley and anattached transmission belt such as a canvas belt, a steel belt, or achain belt; The driving control device (800): It is installed accordingto characteristics of selected continuous variable transmission deviceof different shafts type (100), wherein said driving control device isprovided with a driving power source which is constituted by electricpower supply unit, hydraulic oil pressure supply unit, or pneumaticpressure supply unit and relevant electric power control unit, hydraulicoil pressure control unit, or pneumatic pressure control unit toactively control the transmission speed ratio of the continuous variabletransmission device of different shafts type (100), wherein if automatictorque following speed ratio modulating mechanism, or rotational speedfollowing speed ratio modulating mechanism are selected by thecontinuous variable transmission device of different shafts type (100)to be served as a passively operated continuous variable transmissiondevice, the driving control device (800) is not needed to be installed;if an actively operated continuous variable transmission devicerequiring an external power driving source for speed ratio modulation isselected, said driving control device (800) shall be installed toactively control the speed ratio of said continuous variabletransmission device of different shafts type (100).
 2. A continuousvariable transmission device with low shift transmission pulley train asclaimed in claim 1, wherein it includes that an input shaft (101) of thecontinuous variable transmission device of different shafts type (100)is additionally installed with a driving pulley of low shifttransmission pulley train (102), and an unidirectional transmissiondevice (111) is further installed between the two; transmissiondirection of said unidirectional transmission device (111) shall allowsaid continuous variable transmission device of low shift transmissionpulley train (102) to provide that: during higher load operation, if adecelerating type continuous variable transmission device is adopted bythe continuous variable transmission device of differnet shafts type(100) to operate in a maximum deceleration speed ratio or a near maximumdeceleration speed ratio status, or if an accelerating type continuousvariable transmission device is adopted to operate in a minimumacceleration speed ratio or a near minimum deceleration speed ratiostatus, thereby to make the rotational speed of the driving pulley oflow shift transmission pulley train (102) lower than that of the inputshaft (101) in the same revolving direction, then the revolving kineticenergy of the input shaft (101) is transmitted through theunidirectional tansmission device (111) and the low shift transmissionpulley train (102) to drive the output shaft (103) and further to drivethe load; at said status, the power originally transmitted directlythrough said continuous variable transmission device of different shaftstype (100) is changed to be transmitted through said low shifttransmission pulley train (102) to further drive the output shaft (103);during lower load operation, the power is directly transmitted throughsaid continuous variable transmission device of different shafts type(100) to drive the output shaft (103).
 3. A continuous variabletransmission device with low shift transmission pulley train as claimedin claim 1, wherein if an unidirectional transmission device (111) isselected to be installed between the driven pulley of low shifttransmission pulley train (102) and the output shaft (103), then duringhigher load operation, if a decelerating type continuous variabletransmission device is adopted by the continuous variable transmissiondevice of differnet shafts type (100) to operate in a maximumdeceleration speed ratio or a near maximum deceleration speed ratiostatus, or if an accelerating type continuous variable transmissiondevice is adopted to operate in a minimum acceleration speed ratio or anear minimum deceleration speed ratio status, thereby to make rotationalspeed of the driven pulley of low shift transmission pulley train (102)higher than that of the output shaft (103) in the same revolvingdirection, then the revolving kinetic energy is transmitted through thelow shift transmission pulley train (102) and the unidirectionaltansmission device (111) to drive the output shaft (103) and further todrive the load; at said status, the power originally transmitteddirectly through said continuous variable transmission device ofdifferent shafts type (100) is changed to be transmitted through saidlow shift transmission pulley train (102) to further drive the outputshaft (103); during lower load operation, the power is directlytransmitted through said continuous variable transmission device ofdifferent shafts type (100) to drive the output shaft (103).
 4. Acontinuous variable transmission device with low shift transmissionpulley train as claimed in claim 1, wherein for sake of efficiency, whendiameters of the driving pulley and the driven pulley in the continuousvariable transmission device of differnet shafts type (100) of saidcontinuous variable transmission device with low shift transmissionpulley train are made more similar to each other to ensure a betterefficiency, a middle transmission pulley for accelerating speed ratio ordecelerating speed ratio can be installed to satisfy the needs foraccelerating speed ratio or decelerating speed ratio in order to ensurea better transmission efficiency, wherein said middle transmissionpulley includes: 1) A speed change pulley train (302) is furtherinstalled between the input shaft (101) and the driving pulley ofcontinuous variable transmission device of different shafts type (100)to change the total speed ratio of the input shaft (101) and the outputshaft (103) and is matched to required revolving direction; 2) A speedchange pulley train (402) is further installed between the output shaft(103) and the driven pulley of continuous variable transmission deviceof different shafts type (100) to change the total speed ratio of theinput shaft (101) and the output shaft (103) and is matched to requiredrevolving direction; 3) The speed change pulley trains (302, 402) aresimultaneously installed between the input shaft (101) and the drivingpulley of continuous variable transmission device of different shaftstype (100) and between the output shaft (103) and the driven pulley ofcontinuous variable transmission device of different shafts type (100)to change the total speed ratio of the input shaft (101) through thecontinuous variable transmission device of different shafts type (100)to the output shaft (103) and are matched to required revolvingdirection.
 5. A continuous variable transmission device with low shifttransmission pulley train as claimed in claim 1, wherein the low shifttransmission pulley train can be selected according to applicationrequirements to include one or more than one following constitutionmethods: 1) To be constituted by a single stage low shift transmissionpulley train of fixed speed ratio; 2) To be constituted by a multi-stagetype low shift variable transmission pulley train of manual shift orautomatic transmission.
 6. A continuous variable transmission devicewith low shift transmission pulley train as claimed in claim 1, whereinthe input methods for supplying revolving kinetic energy to the inputshaft (101) can be selected based on application requirements to includeone or more than one following inputting methods: 1) The input shaft(101) is for receiving direct revolving power source input fromrevolving power source such as engine, motor or generator or input fromflywheel, wind power fan blades, gas or liquid turbines, or manualpower; 2) The revolving power sources as said in item 1) supplied to theinput shaft (101) for output is first controlled by a clutching devicebefore providing revolving kinetic energy output; 3) The revolving powersources as said in item 1) supplied to the input shaft (101) for outputis further through a speed change device with fixed speed ratio, or astepped or stepless speed change device of manual shift or automatictransmission, or a fluid transmission device, or an electromagnetic eddycurrent transmission device to provide revolving kinetic energy output;4) The revolving power sources as said in item 1) supplied to the inputshaft (101) for output is further through a clutching device and a speedchange device with fixed speed ratio, or a stepped or stepless speedchange device of manual shift or automatic transmission, or a fluidtransmission device, or an electromagnetic eddy current transmissiondevice to provide revolving kinetic energy output.
 7. A continuousvariable transmission device with low shift transmission pulley train asclaimed in claim 1, wherein the revolving kinetic energy output from theoutput shaft (103) can be selected according to application requirementsto include one or more than one outputting methods as following: 1) Therevolving kinetic energy output from the output shaft (103) is directlyused to drive the load; 2) The revolving kinetic energy output from theoutput shaft (103) is through a clutching device to further drive theload; 3) The revolving kinetic energy from the output shaft (103) isthrough a speed change device with fixed speed ratio, or a stepless orstepped speed change device of manual shift or automatic transmission,or a fluid transmission device, or electromagnetic eddy currenttransmission device to further drive the load; 4) The revolving kineticenergy output from the output shaft (103) is through a clutching deviceand a speed change device with fixed speed ratio, or a stepless orstepped speed change device of manual shift or automatic transmission,or a fluid transmission device, or an electromagnetic eddy currenttransmission device to further drive the load.
 8. A continuous variabletransmission device with low shift transmission pulley train as claimedin claim 1, wherein the practical applied structures of said continuousvariable transmission device of different shafts type (100) and said lowshift transmission pulley train (102) can be selectively made toindependently separated mechanical devices and combined afterwards fortransmission or made to an integral structure or made to a structure ofa common integrated mechanical device and a common integrated casing.